Answer:
-x^2 + 21x + 3.
Step-by-step explanation:
9x - (x – 3)(x + 1) + 10x
= 19x - (x^2 - 2x - 3)
= -x^2 + 2x + 19x + 3
= -x^2 + 21x + 3.
92287262=6282992=72727275=2092÷6&^×=
In general for a rectangle of dimensions w by h and a semicircle of diameter w we get an area:

The halfs are because a semicircle is half a circle and a radius is half a diameter.
We're told

Substituting,

Answer: B